What indicates the humeri are medially rotated when viewed from the back?

When assessing whether the humeri are medially rotated from a posterior view, the palpation of the olecranon process is particularly revealing. The olecranon process, which is the bony prominence of the ulna at the elbow, serves as a reference point for the alignment of the upper arm.

In a medially rotated position, the olecranon process will be oriented differently compared to its position in a neutral or laterally rotated alignment. When the humeri are medially rotated, the forearms may turn inward, which affects the position of the wrists and elbows. Palpating the olecranon allows observers to gauge the rotation of the humerus, as any internal rotation will alter the orientation of this bony landmark.

The other options, such as the position of the wrists or the alignment of the elbows, could indicate various postural issues, but they do not directly provide a clear indication of the rotation of the humeri themselves. The shoulder angle may suggest overall positioning but lacks specificity when determining the humeral rotation. Thus, focusing on the olecranon process provides a direct method for evaluating humeral positioning in relation to medial rotation.